Sen. Scott Brown (R-Mass.) said that Democrats are making it "awfully tempting" for him to run in a possible special election for Sen. John KerryJohn Forbes KerryJohn Kerry to NYU Abu Dhabi: We can't address world problems by 'going it alone' Juan Williams: Trump's dangerous lies on Iran Pompeo: US tried, failed to achieve side deal with European allies MORE's (D-Mass.) seat, if Kerry is confirmed as secretary of State.

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“I’ll tell you what; They’re making it awfully tempting. You got Ed MarkeyEdward (Ed) John MarkeyHillicon Valley: Lawmakers target Chinese tech giants | Dems move to save top cyber post | Trump gets a new CIA chief | Ryan delays election security briefing | Twitter CEO meets lawmakers Twitter CEO meets with lawmakers to talk net neutrality, privacy Senate votes to save net neutrality rules MORE: Does he even live here any more?” Brown said on the “Jim & Margery Show” on WTKK-FM when asked about a possible run, according to the Boston Globe.

Rep. Edward MarkeyEdward (Ed) John MarkeyHillicon Valley: Lawmakers target Chinese tech giants | Dems move to save top cyber post | Trump gets a new CIA chief | Ryan delays election security briefing | Twitter CEO meets lawmakers Twitter CEO meets with lawmakers to talk net neutrality, privacy Senate votes to save net neutrality rules MORE (D) has already announced his intentions to run for the Massachusetts seat. Several national and prominent Massachusetts Democrats, including Kerry himself, threw their support behind Markey last week.

Brown is considered a top GOP contender for the seat. He has dropped hints that he's interested in a run, but hasn't yet made it official. 

His comments on the show previewed what could be a possible attack against Markey — questions concerning his residency in Massachusetts.

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“You’ve got to check the travel records. I’ve come back and forth (from Washington to Boston) every weekend, almost, for three years, and I see, you know, most of the delegation, and I have never seen Ed on the airplane — ever,” Brown said.

Markey claims his voting residency in his hometown of Malden, Mass. But he also owns a home in Chevy Chase, Md., and his wife works just outside of D.C.

Questions concerning Markey's residency have been a problem for him in the past. In 2010, his Republican opponent questioned where Markey truly called home, prompting Markey to produce government documents to prove he still has roots in Massachusetts.

A recent poll conducted for the congressman also asked respondents questions concerning his residency, to gauge their potential impact on his candidacy.

Brown was elected to the Senate in 2010 in a special election following the death of longtime Massachusetts Sen. Edward Kennedy. Brown lost his Senate seat in the November election to Democrat Elizabeth WarrenElizabeth Ann WarrenJuan Williams: Trump gives life to the left Elizabeth Warren urges grads to fight for 'what is decent' in current political climate Tomi Lahren responds to genealogist's investigation of her family: 'She failed miserably' MORE